public List <T> SearchObjects()
{
object searchTemplate = new T();
ObjectPropertyForm opf = new ObjectPropertyForm(searchTemplate, true);
ArrayList parameters = new ArrayList();
string query = string.Empty;
if (opf.ShowDialog() != DialogResult.OK)
{
return(null);
}
foreach (FieldEntry fe in opf.SearchParams)
{
string name = fe.FieldInfo.Name;
FieldInfo fi = fe.FieldInfo;
query += "[" + name + "]";
string op = " = ";
if (fi.FieldType == typeof(string))
{
op = " LIKE ";
}
query += op;
query += "{" + parameters.Count + "}";
parameters.Add(fe.Value);
}
if (query == string.Empty)
{
query = null;
}
NDOQuery <T> ndoQuery = new NDOQuery <T>(pm, query, false);
if (parameters.Count > 0)
{
foreach (object par in parameters)
{
ndoQuery.Parameters.Add(par);
}
}
return(ndoQuery.Execute());
}
private void btnEdit_Click(object sender, EventArgs e)
{
object displayedObject = null;
switch (this.tabControl1.SelectedTab.Text)
{
case "Customers":
displayedObject = SelectedCustomer;
break;
case "Employees":
displayedObject = SelectedEmployee;
break;
case "Orders":
displayedObject = SelectedOrder;
break;
case "Order Details":
displayedObject = SelectedOrderDetail;
break;
case "Products":
displayedObject = SelectedProduct;
break;
}
if (displayedObject != null)
{
// In a real world application it would make more sense to write specialized
// Forms for creating and editing the different objects. In this forms you can
// do things like showing the customer fotos or querying for related objects
// as it is the case with the shipper of an order.
ObjectPropertyForm opf = new ObjectPropertyForm(displayedObject, false);
if (opf.ShowDialog() == DialogResult.OK)
{
pm.Save();
}
}
}
private void btnAdd_Click(object sender, EventArgs e)
{
try
{
object displayedObject = null;
BindingSource list = null;
switch (this.tabControl1.SelectedTab.Text)
{
case "Customers":
displayedObject = new Customer();
this.pm.MakePersistent(displayedObject);
list = customerBindingSource;
break;
case "Employees":
displayedObject = new Employee();
this.pm.MakePersistent(displayedObject);
list = employeeBindingSource;
break;
case "Orders":
Customer c = SelectedCustomer;
Employee emp = SelectedEmployee;
if (c != null && emp != null)
{
Order o = c.NewOrder();
o.Employee = emp;
o.OrderDate = DateTime.Now.Date;
o.RequiredDate = DateTime.Now.Date + TimeSpan.FromDays(14);
o.ShippedDate = DateTime.Now.Date;
o.ShipName = c.CompanyName;
o.ShipCity = c.City;
o.ShipCountry = c.Country;
o.ShipAddress = c.Address;
o.Freight = 374m;
o.Shipper = this.DefaultShipper;
o.ShipPostalCode = c.PostalCode;
o.ShipRegion = c.Region;
displayedObject = o;
list = orderBindingSource;
}
break;
case "Order Details":
OrderDetail od = new OrderDetail();
Product p = SelectedProduct;
od.Product = p;
od.Order = SelectedOrder;
od.Quantity = 1;
od.UnitPrice = p.UnitPrice;
displayedObject = od;
pm.MakePersistent(od);
list = orderDetailBindingSource;
break;
case "Products":
MessageBox.Show("Sorry, adding products is not implemented.");
break;
}
if (displayedObject != null)
{
ObjectPropertyForm opf = new ObjectPropertyForm(displayedObject, false);
if (opf.ShowDialog() == DialogResult.OK)
{
pm.Save();
list.Add(displayedObject);
}
else
{
pm.Abort();
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error");
pm.Abort();
}
}
